The paper analyses the different characters b etween shared network and switched network,uses ARP spoofing to realize identify ing of local area networks with the vulnerabilities of ARP protocol,and shows th e codes of realization and comments.

• 该文在分析共 享网络和交换网络各自特点的基础上，利用ARP协议的弱点，使用ARP欺骗实现了局域网络类 型的识别，同时给出了具体的实现代码和详细的注释。